Door-lock.



- n. MCKAY.

DOOR LOCK.

APPLICATION FILED FEB. 5. I9`I4. 1,215,686. Patented Feb.13,1917.

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2 SHEETS-SHEET 2 DANIEL MUKAY, 0F ARNPRIOB., ONTARIO, CANADA.

DOOR-LOCK.

i Specification of Letters Patent.

Patented Feb. 13, '1917.

Application led February 5, 1914. Serial No. 816,792.

To all whom z't may concern.'

Be it known that I, DANIEL MCKAY, a

subject of the King of Great Britain, and

resident of the town of Arnprior, in the Province of Ontario, Dominionof Canada, have invented certain new and useful lmprovements inDoor-Locks, of which the following is a specification.

The invention relates to improvements 1n door locks, as described in thepresent specification, and illustrated in the accompanying drawings thatform part of the same.

The invention consists essentially of the novel arrangement andconstruction of parts, whereby the latch-bolt moves later'- ally into aside opening of an operating tube having means therein operated by keyand latch pin for closing said opening.

The objects of the invention are to devise a lock of simple and durableconstruction which will havea minimum number of operating parts and bereadily applied to a door. y

In the drawings, Figure 1 is a cross scctional view of a door sectionhaving the lock and operating handles attached thereto.

Fig. 2 is an elevation view of the lock with the front plate of thefacing removed.

Fig. 3 is a perspective detail view of the latch-bolt.

Fig. 4 is a perspective detail view of the knob-tube. Y

Fig. 5 is a perspective detail View of the locking tube.

Fig. 6 is a yperspective detail view of the slidable clutch end of theknob-tube.

Fig. 7 is a perspective detail view of one of the knobs.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, `1 1s the lock casing shown in theaccompanying drawings as a mortise lock, though it w1ll readily beunderstood that the casing may be made in any form or shape to beapplied to the outside of a door if desired without departing from thespirit of my invention as hereinafter described.

2 is the front plate of the casing secured thereto by the screws 3inserted through a suitable orifice in the front plate, and into acorrespondingly threaded orifice in the back of the casing.

4 is the latch-bolt having the beveled latch end 5 as customary, thelongitudinal slot 6, the forked end 7 with the angular-ly vturnedextremities 8 and the tail-piece 9 extending between said forked end.

The latch-bolt 1 is fitted within the casing l with the beveled endprojecting through a suitable opening inthe front of the casing ascustomary, and the screw 3 passing through the slot (3 at the inner endthereof, the compression spring 1() being inserted in said slot betweenthe screw and the latch end of the latch-bolt, whereby said bolt isspring held with the latch end thereof projecting beyond the lockcasing.

11 is the knob-tube extending `laterally through the side openings l2 inthe cover plate and back of the lock casing, and between the forked endsof the latch-bolt immediately alongside the end of the taill piece 9.

13 is a circumferential fiange formed around the tube 11 immediatelyinside the back of the casing.

14 is a circumferential slot extending substantially halfway around theknob-tube 11 immediately next the flange I13 on the inside of thecasing.

15 are tumbler arms secured to the knobtube 11 between the slot 14 andthe front plate 2, said tumbler arms extending past the ends 8 of thelatch-bolt 4, whereby on the rotation of the knob-tube in eitherdirection one or other of said tumbler arms will engage with an end 8,and move the latchbolt 4 into the lock casingagainst the pressure of thespring 10, such action all being common in door lock construction.

16 is a circumferential slot extending substantially halfway around theknob-tube at' the end extending to the inside of the door.

17 is a threaded orifice in one side of the knob-tube adjacent the slot16.

18 is a knob having the shank thereof fitting over the inner ends of theknob-tube 11, andthe screw 19 inserted through a suitable orifice insaid shank, and into the threaded orifice 17, whereby said .knob issecurely fastened to the knob 2.

20 is an inner tube fitting the knob-tube 11, and having a slot 21`inthe periphery thereof registering with the slot 14 of said knob-tube. l

22 is a latch-pin having the inner' end thereof threaded,and extendingthrough the slot 16 in the knob-tube, and into a correspondinglythreaded orifice in the inner tube 20, whereby said inner tube issecurely held in position from end movement within the knob-tube, butmay be rotated inside said knob-tube by moving the latch-pin 22 aroundthe slot 16.

, 23 is a circumferential groove extending around the inner tube 20, andhaving the fiat spring -24 bent therearound, and exerting continualpressureagainst the. inner periphery of the knob-tube, and causingsufiicient friction to retain said inner tube in any set position insaid knob-tube.

The end of the inner tube 20 on the outside of the door is closed by theplate 25, said tube having the cross slot 26 therein.

27 is the outside door knob having the shank 28 thereof extending overthe outer end of the knob-tube 11.

29 is a screw inserted through a suitable threaded orifice in the shank28, having the inner end thereof extending into a circumferential groove30 extending around the knob-tube 1l, whereby the handle 27 may beturned completely around without turning the knob-tube.

31 is a longitudinally extending slot in one side of the shank 28.

32 is a clutch tube having one end closed by the plate 33 having theorifice 34 therethrough.

The end of the clutch tube opposite the plate 33 is notched at 35 tointerlock with the correspondingly tongued end 36 of the knob-tube.

37 is a spring-finger having one end thereof secured to the clutch tube32, and the opposite end thereof projecting through the slot 31 in theshank 28.

38 isk a lug projecting outwardly-from the clutch tube 32, and into theslot 31 where it,7 extends as a groove 39 on\the inside of the shank 28.

40 is the key-hole formed in the center of the knob 27.

In the operation of the lock it will be'understood that the latch-bolt imay be readily Withdrawn into the lock casing by turning the knob 18,whereby the knob-tube 11 is turned and the tumbler arms 15 made tooperate the latch-bolt as hereinbefore described, the tail-piece 9 ofsaid latch-bolt always entering the slots 14 and 21 in the knob-tube andinner tube respectively, said slots being in register one with the otheruntil it is desired to lock the door.

The door may be locked on the inside at any time desired by moving thelatch-pin 22 around in the slot 16 in the knob-tube, thereby turning theinner tube 20 so that the slot 21 thereof is turned to the opposite Sideof the knob-tube, thereby closing the slot 14, and preventing theentrance of the tail-piece 9, thus rendering the latch-bolt immovableand securely locking the door.

The clutch tube 32 is normally in the position shown in Fig. 1 of thedrawings, that islwith the notched end thereof interlocking with .thetongued end of the knob-tube, and as said clutch tube is pre-vented fromrotation within the knob-shank 28 by means of the lug 38, the knob 27will be normally connected to the knob-tube, and operate the latch-boltin an exactly similar manner to the knob 18 as hereinbefore described.

To lock the door from the outside a key 41 may be inserted through thekey-hole 40, said key being so shaped that it will pass through theorifice 34: in the clutch tube 32, and the end thereof enter the slot 26in the end plate 25 of the inner tube 20. rlhe key may then be turned toturn the inner tube, and prevent movement of the latch-bolt in anexactly similar manner as the operation described with the turning ofthe latch-pin 22.

The outside knob 27 may be at any time operatively disconnected from theknob-tube by drawing the spring-finger 37 outwardly along the slot 31 inthe knob-shank, until said spring-linger springs under the knobshank atthe end of the slot 31.

This movement of the spring-finger draws the notched c nd of theclutch-tube out of engagement with the corresponding tongued end of theknob tube, leaving the knob free to be turned about on the said knobtube as hereinbefore explained, and without operative action of any kindon the latch-bolt, practically giving the same result as locking thedoor with a key.

When it is desired to again 4operatively connect the outside knobwiththe knob-tube, 1t 1s only necessaryto insert the key to the end, thekey being shaped so that only a part thereof will pass through theorifice in the clutch tube, when the larger portion of the key carriesthe clutch tube inwardly with it, until said clutch tube again engageswith the knob-tube.

It will of course be understood that many having a peripheral slot intowhich the inner end of said latch-bolt extends and tumbler armsextending therefrom and engaging with said latch-bolt and a peripheralgroove adjacent one end thereof, a knob having a central lore andfitting over one end of said knob-tube and having a longitudinal groovethrough the shank thereof into said bore, a screw inserted through asuitable orifice in the shank of said knob and into the groove in saidknob-tube, an inner tube arranged Within said knob-tube and having awith the peripheral slot in said knob-tube and a closed end having a keyrecess therein, a clutch tube slidably arranged in the bore of said knoband interlocking with the end of said knob-tube and having aspring-finger extending into the longitudinal slot in said knob-shankand a closed end with a key peripheral slot registeringopeningtherethrough and a key inserted through the bore of said knob and thekey opening in said clutch tube and fitting the key recess in said innertube.

Signed at the city Ioi' Ottawa, Province of Ontario, Canada, this 16thday of Jannary, 1913.

DANIEL MCKAY. Witnesses:

K. L. MACGIBBON, L. HUBER.

